Palynomorph biostratigraphy, palynofacies, thermal maturity and paleoenvironmental interpretation of the Bajocian–Aptian succession in the OBA D-8 Well, Matruh Basin, Egypt

Raafat, Aya; Tahoun, Sameh S.; Ela, Nabil M. Aboul

doi:10.1016/j.jafrearsci.2021.104157

Cited by 7 publications

(9 citation statements)

References 45 publications

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“…In Egypt, it is described from the Berriasian-Valanginian of Dakhla Oasis, Egypt (Schrank and Mahmoud 1998), the Barremian of north Sinai (Aboul Ela and Tahoun 2010). This Zone is matched with the Barremian Aequitriradites spinulosus-cupressacites Assemblage Zone of Aboul Ela and Tahoun (2010), middle-late Barremian Aequitriradites spinulosus Interval Zone of Raafat et al (2021), and late Barremian Aequitriradites spinulosus Interval Subzone of Ied and Tahoun (2019).…”

Section: Characteristicsmentioning

confidence: 55%

“…This taxon was also recorded from the late Barremian of Germany (Prössl 1990), Hauterivian-Barremian of Israel (Brenner 1974), and England (Costa and Davey 1992). This zone can be matched with Tenua anaphrissa Interval Zone (Raafat et al 2021) and Pseudoceratium anaphrissum DC4 Interval Zone (Aboul Ela and Tahoun 2010) of middle-late Barremian age in north Egypt and with late Barremian Zone III in north Western Desert, Egypt (Ibrahim and Schrank 1996). The present zone is also correlated with Barremian Pseudoceratium anaphrissum-Muderongia staurota Assemblage Zone recognized by Thusu et al (1988) in NE Libya and the Aptea anaphrissum subzone of Barremian age (Williams 1977).…”

Section: I: Tenua Anaphrissa Interval Zonementioning

confidence: 71%

“…Systematophora areolata was recorded from late Oxfordian-early Kimmeridgian of England (Thomas and Cox 1988) and north Eastern Desert (Ibrahim et al 2002). This zone can be correlated with the late Oxfordian-Kimmeridgian Gonyaulacysta jurassica Interval Zone (Raafat et al 2021) in north Western Desert, late Oxfordian Assemblage Zone of El Beialy and Ibrahim (1997) of north Sinai, Egypt. Also, it could be matched with DJ2 and DJ1 Zones (Aboul Ela and Tahoun 2010) in north Sinai, Egypt; Zones 5 and 6 of north Eastern Desert (Ibrahim et al 2002), and Zone 1 of Western Desert (Ibrahim and Schrank 1996).…”

Section: Characteristicsmentioning

confidence: 87%

“…This includes Soliman (1977) and Omran et al (1990). Subsequently, a large number of palynological studies concerned with palynofacies analysis, palaeoenvironmental interpretation, and determination of kerogen type and hydrocarbon potentiality combined with systematic palynology and relative age dating were carried out, e.g., Aboul Ela and Mahrous (1992); Abdel Mohsen (1992); El Beialy (1994); Aboul Ela and El Shamma (1997); Mahmoud and Maowad (2000); Ibrahim et al (2002); Aboul Ela and Tahoun (2010); El Beialy et al (2010); Tahoun (2012); Makled and Tahoun (2015); Tahoun et al (2015); Deaf and Tahoun (2018); Tahoun and Ied (2019); Ied and Tahoun (2019); Gentzis et al (2018); Aboul Ela et al (2020); Deaf et al (2020); Mansour et al (2020a-d(;Mohamed et al (2020); Tahoun and Mohamed (2020); Ied et al (2020); Ibrahim et al (2020); Mansour et al (2021); and Raafat et al (2021).…”

Section: Introductionmentioning

confidence: 99%

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Palynology and palynofacies of the Middle Jurassic and Lower Cretaceous successions of northwest Egypt

2021

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The present palynological study was performed on 62 cutting samples from the Khatatba, Masajid and Alam El Bueib formations encountered in two wells, Matruh Basin, North Western Desert, Egypt. From the quantitative and qualitative analyses of the studied samples, seven biozones were proposed ranging between Bajocian and Barremian age, which include from young to old: I: Tenua anaphrissa Interval Zone (middle-late Barremian), II: Muderongia simplex Interval Zone (late Hauterivian-early Barremian), III: Systematophora sp. Acme Zone (Valanginian-early Hauterivian), IV: Gonyaulacysta jurassica Interval Zone (late Oxfordian-Kimmeridgian), V: Ctenidodinium continuum Interval Zone (early Oxfordian), VI: Korystocysta gochtii Interval Zone (late Bathonian-Callovian), and VII: Pareodinia ceratophora and Dissiliodinium sp. Assemblage Zone (late Bajocian-early Bathonian). Additionally, six palynofacies assemblages are differentiated and the source rock potential is visually evaluated. The samples from the Alam El Bueib Formation belong to kerogen type III/II of mainly gas prone. It contains immature yellow to orange palynomorphs. The Masajid Formation shows kerogen type II of immature oil prone material. The Khatatba Formation source rock attains the highest levels of source-rock maturity. The upper part of Khatatba Formation (Zahra Member) indicates marginally mature, oil prone organic matter, while the lower part of the Khatatba Formation (Upper Safa, Kabrit, and Lower Safa members) are characterized by late mature organic matter with dark brown palynomorphs. Based on the recovered palynomorphs and palynofacies assemblages, four depositional environments were identified, Fluvio-deltaic, Marginal marine, Proximal inner neritic, and Inner neritic.

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Section: Characteristicsmentioning

confidence: 55%

Section: I: Tenua Anaphrissa Interval Zonementioning

confidence: 71%

Section: Characteristicsmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

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Palynology and palynofacies of the Middle Jurassic and Lower Cretaceous successions of northwest Egypt

2021

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“…Recently, Gentzis et al [38] reported the common occurrence of D. sellwoodii within the Khatatba Formation and the last appearance datum in the lowermost part of the overlying lower Oxfordian Masajid Formation, suggesting an age no younger than Callovian. Similar age assignments were proposed for the same interval in the Shushan [15] and Matruh basins in the north Western Desert [39]. Furthermore, D. sellwoodii was used as a Bathonian-Callovian marker in Arctic Norway [40], the eastern Netherlands [41], England [42], and southern France [43].…”

Section: Age Assessmentmentioning

confidence: 98%

Recurring Patterns of Sea Level Changes within a Palynological-Based Sequence Stratigraphy Framework of the Middle Jurassic Organic Matter-Rich Khatatba Formation, Egypt

et al. 2023

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The Middle Jurassic was a time of marginal to shallow shelf settings dominated by organic matter-rich deposition in northern Egypt, southern Tethys. Paleoenvironmental and sequence stratigraphic reconstructions are of paramount significance for a better understanding of basin history and related reservoirs and source rock units. For this purpose, a detailed palynomorph and palynofacies analysis of the Middle Jurassic Khatatba Formation in the Dahab-Mireir Basin, north Western Desert, was conducted. A moderately to well-preserved, moderately diverse palynomorph assemblage of spores, pollen, and dinoflagellate cysts is identified. Marker dinoflagellate cysts, including Dichadogonyaulax sellwoodii, Escharisphaeridia pocokii, Gonyaulacysta adecta, Korystocysta gochtii, Pareodinia ceratophora, and Wanaea acollaris, defined a Bajocian to Callovian age. Palynofacies analysis of the Khatatba Formation revealed two assemblages, whereby PFA-1 is the most abundant in the study well and is comprised mainly of terrestrial phytoclasts deposited nearby fluvio-deltaic sources. The infrequently reported PFA-2 consists of moderate abundances of phytoclasts and AOM, deposited in an inner shelf environment. A more reliable paleoenvironmental interpretation was indicated based on three palynomorph assemblages. The spore-dominated assemblage indicated deposition in a deltaic environment, while the mixed palynomorph assemblage revealed fluvio-deltaic to marginal shallow marine conditions. The microplankton-dominated assemblage is represented by minor samples and reflects an offshore inner shelf condition. Furthermore, the Middle Jurassic relative sea level was reconstructed based on the quantitative variations in the terrestrial/marine (T:M) ratios and abundances of spores, pollen, and dinoflagellate cysts. This led to the subdivide of the Khatatba Formation into thirteen third-order transgressive-regressive sequences, which can be correlated with the global Jurassic short-term sea level changes. Active tectonics and accelerated drifting of the Eurasian Plate during the Middle Jurassic are suggested to control basin uplift/subsidence and, therefore, recurring patterns of relative sea level change.

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Palynostratigraphy and paleoenvironmental inferences of the Jurassic successions, Darag Basin, Gulf of Suez, Egypt

Shehata

Tahoun

Kassem

et al. 2023

Journal of African Earth Sciences

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Palynomorph biostratigraphy, palynofacies, thermal maturity and paleoenvironmental interpretation of the Bajocian–Aptian succession in the OBA D-8 Well, Matruh Basin, Egypt

Cited by 7 publications

References 45 publications

Palynology and palynofacies of the Middle Jurassic and Lower Cretaceous successions of northwest Egypt

Palynology and palynofacies of the Middle Jurassic and Lower Cretaceous successions of northwest Egypt

Recurring Patterns of Sea Level Changes within a Palynological-Based Sequence Stratigraphy Framework of the Middle Jurassic Organic Matter-Rich Khatatba Formation, Egypt

Palynostratigraphy and paleoenvironmental inferences of the Jurassic successions, Darag Basin, Gulf of Suez, Egypt

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